diff options
Diffstat (limited to 'openbsd-compat/xcrypt.c')
| -rw-r--r-- | openbsd-compat/xcrypt.c | 156 |
1 files changed, 156 insertions, 0 deletions
diff --git a/openbsd-compat/xcrypt.c b/openbsd-compat/xcrypt.c new file mode 100644 index 0000000..9cded66 --- /dev/null +++ b/openbsd-compat/xcrypt.c @@ -0,0 +1,156 @@ +/* + * Copyright (c) 2003 Ben Lindstrom. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. + * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include "includes.h" + +#include <sys/types.h> +#include <string.h> +#include <unistd.h> +#include <pwd.h> + +# if defined(HAVE_CRYPT_H) && !defined(HAVE_SECUREWARE) +# include <crypt.h> +# endif + +# ifdef __hpux +# include <hpsecurity.h> +# include <prot.h> +# endif + +# ifdef HAVE_SECUREWARE +# include <sys/security.h> +# include <sys/audit.h> +# include <prot.h> +# endif + +# if defined(HAVE_SHADOW_H) && !defined(DISABLE_SHADOW) +# include <shadow.h> +# endif + +# if defined(HAVE_GETPWANAM) && !defined(DISABLE_SHADOW) +# include <sys/label.h> +# include <sys/audit.h> +# include <pwdadj.h> +# endif + +# if defined(WITH_OPENSSL) && !defined(HAVE_CRYPT) && defined(HAVE_DES_CRYPT) +# include <openssl/des.h> +# define crypt DES_crypt +# endif + +#define MINIMUM(a, b) (((a) < (b)) ? (a) : (b)) + +/* + * Pick an appropriate password encryption type and salt for the running + * system by searching through accounts until we find one that has a valid + * salt. Usually this will be root unless the root account is locked out. + * If we don't find one we return a traditional DES-based salt. + */ +static const char * +pick_salt(void) +{ + struct passwd *pw; + char *passwd, *p; + size_t typelen; + static char salt[32]; + + if (salt[0] != '\0') + return salt; + strlcpy(salt, "xx", sizeof(salt)); + setpwent(); + while ((pw = getpwent()) != NULL) { + if ((passwd = shadow_pw(pw)) == NULL) + continue; + if (passwd[0] == '$' && (p = strrchr(passwd+1, '$')) != NULL) { + typelen = p - passwd + 1; + strlcpy(salt, passwd, MINIMUM(typelen, sizeof(salt))); + explicit_bzero(passwd, strlen(passwd)); + goto out; + } + } + out: + endpwent(); + return salt; +} + +char * +xcrypt(const char *password, const char *salt) +{ + char *crypted; + + /* + * If we don't have a salt we are encrypting a fake password for + * for timing purposes. Pick an appropriate salt. + */ + if (salt == NULL) + salt = pick_salt(); + +#if defined(__hpux) && !defined(HAVE_SECUREWARE) + if (iscomsec()) + crypted = bigcrypt(password, salt); + else + crypted = crypt(password, salt); +# elif defined(HAVE_SECUREWARE) + crypted = bigcrypt(password, salt); +# else + crypted = crypt(password, salt); +#endif + + return crypted; +} + +/* + * Handle shadowed password systems in a cleaner way for portable + * version. + */ + +char * +shadow_pw(struct passwd *pw) +{ + char *pw_password = pw->pw_passwd; + +# if defined(HAVE_SHADOW_H) && !defined(DISABLE_SHADOW) + struct spwd *spw = getspnam(pw->pw_name); + + if (spw != NULL) + pw_password = spw->sp_pwdp; +# endif + +#ifdef USE_LIBIAF + return(get_iaf_password(pw)); +#endif + +# if defined(HAVE_GETPWANAM) && !defined(DISABLE_SHADOW) + struct passwd_adjunct *spw; + if (issecure() && (spw = getpwanam(pw->pw_name)) != NULL) + pw_password = spw->pwa_passwd; +# elif defined(HAVE_SECUREWARE) + struct pr_passwd *spw = getprpwnam(pw->pw_name); + + if (spw != NULL) + pw_password = spw->ufld.fd_encrypt; +# endif + + return pw_password; +} |